Fox 40 classic finger grip whistle blackthe original fox 40 whistle this is the one that changed the gamefor referees and coaches at every level who want every call to be heard and depend on its reliability the flawless consistent and penetrating sound keeps the referee in control of the game and can be heard above the crowds and players this makes it the standard choice for personal safety and rescue professionals worldwide it can also be heard above ambient noise engine roars and brea